Check in codegen test expectations.

test/codegen/expect/language/string_optimizations_test.js

Index: test/codegen/expect/language/string_optimizations_test.js
diff --git a/test/codegen/expect/language/string_optimizations_test.js b/test/codegen/expect/language/string_optimizations_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..df88913cea21d4e62b6fba124b11b5009449b73a
--- /dev/null
+++ b/test/codegen/expect/language/string_optimizations_test.js
@@ -0,0 +1,45 @@
+dart_library.library('language/string_optimizations_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__string_optimizations_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const string_optimizations_test = Object.create(null);
+  const compiler_annotations = Object.create(null);
+  let VoidToint = () => (VoidToint = dart.constFn(dart.definiteFunctionType(core.int, [])))();
+  let __Todynamic = () => (__Todynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [], {path: dart.dynamic})))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  let dynamicTobool = () => (dynamicTobool = dart.constFn(dart.definiteFunctionType(core.bool, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  string_optimizations_test.foo = function(opts) {
+    let path = opts && 'path' in opts ? opts.path : null;
+    dart.fn(() => 42, VoidToint());
+    return dart.toString(path);
+  };
+  dart.fn(string_optimizations_test.foo, __Todynamic());
+  string_optimizations_test.bar = function(opts) {
+    let path = opts && 'path' in opts ? opts.path : null;
+    dart.fn(() => 42, VoidToint());
+    return path;
+  };
+  dart.fn(string_optimizations_test.bar, __Todynamic());
+  string_optimizations_test.main = function() {
+    let a = [string_optimizations_test.foo({path: '42'}), string_optimizations_test.foo(), 42, string_optimizations_test.bar({path: '54'})];
+    expect$.Expect.isTrue(typeof a[dartx.get](1) == 'string');
+    expect$.Expect.throws(dart.fn(() => dart.dsend(string_optimizations_test.bar(), 'concat', '54'), VoidTovoid()), dart.fn(e => core.NoSuchMethodError.is(e), dynamicTobool()));
+  };
+  dart.fn(string_optimizations_test.main, VoidTodynamic());
+  compiler_annotations.DontInline = class DontInline extends core.Object {
+    new() {
+    }
+  };
+  dart.setSignature(compiler_annotations.DontInline, {
+    constructors: () => ({new: dart.definiteFunctionType(compiler_annotations.DontInline, [])})
+  });
+  // Exports:
+  exports.string_optimizations_test = string_optimizations_test;
+  exports.compiler_annotations = compiler_annotations;
+});